What if, though, “selves” are present in those very cells, ahead of the point at which they merge to form a greater whole? It might sound outlandish, but biological simulations are indicating that those minuscule units of life, which we usually think about as passive machines – cogs blindly governed by the laws of physics – have their own goals and display agency. Surprisingly, even simple networks of biomolecules appear to display some degree of a self, a revelation that could lead to novel ways of treating health conditions with far fewer side effects.

What’s more, some biologists say this new grasp of selfhood can reveal what is special about life and how it began in the first place. “The origins of agency coincide with the origins of life,” says cognitive scientist Tom Froese at the Okinawa Institute of Science and Technology in Japan.